/* ==========================================================================
   TENKA FINANCE - INSTITUTIONAL YIELD ON ROBINHOOD CHAIN (EXACT COLOR THEME)
   Theme Palette: Minimalist Ice Cream Light (#f8f9fa), Pure White Cards (#ffffff),
                  Slate Black (#0f172a), Emerald Yield (#059669), Border (rgba(0,0,0,0.08))
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=DM+Mono:ital,wght@0,400;0,500&family=Space+Grotesk:wght@400;500;600;700&display=swap');

:root {
  --bg-dark: #f8f9fa;
  --bg-card: #ffffff;
  --bg-accent: #f1f5f9;

  --stroke: rgba(15, 23, 42, 0.08);
  --stroke-strong: rgba(15, 23, 42, 0.18);

  --text-1: #0f172a;
  --text-2: #475569;
  --text-3: #64748b;

  --black-primary: #0f172a;
  --black-hover: #1e293b;
  --emerald-green: #059669;
  --cyan-accent: #0284c7;

  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Space Grotesk', sans-serif;
  --font-mono: 'DM Mono', monospace;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 9999px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-dark);
  color: var(--text-1);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  line-height: 1.55;
  background: var(--bg-dark);
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
}

/* Layout Wrappers */
.wrap-1200 {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Navbar */
.navbar-tenka {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 36px;
  background: rgba(248, 249, 250, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--stroke);
}

.brand-logo-tenka {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-1);
}

.brand-logo-tenka span.mark {
  color: var(--emerald-green);
}

.chain-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(5, 150, 105, 0.08);
  border: 1px solid rgba(5, 150, 105, 0.25);
  color: var(--emerald-green);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
}

.nav-links-tenka {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link-tenka {
  color: var(--text-2);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.15s ease;
}

.nav-link-tenka:hover, .nav-link-tenka.active {
  color: var(--text-1);
}

/* Buttons */
.btn-tenka-cyan {
  background: var(--black-primary);
  color: #ffffff;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  border: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.2s ease;
}

.btn-tenka-cyan:hover {
  background: var(--black-hover);
  transform: translateY(-1px);
}

.btn-tenka-outline {
  background: #ffffff;
  color: var(--text-1);
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  border: 1px solid var(--stroke-strong);
  transition: all 0.2s ease;
}

.btn-tenka-outline:hover {
  border-color: var(--text-1);
  background: var(--bg-accent);
}

/* Hero Section */
.hero-tenka {
  padding: 150px 0 80px;
  position: relative;
  background: var(--bg-dark);
}

.eyebrow-tag-tenka {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--emerald-green);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
}

h1.hero-h-tenka {
  font-family: var(--font-display);
  font-size: clamp(40px, 5.5vw, 72px);
  line-height: 1.05;
  letter-spacing: -0.04em;
  font-weight: 700;
  color: var(--text-1);
  max-width: 680px;
  margin-bottom: 24px;
}

.hero-sub-tenka {
  font-size: 1.1rem;
  color: var(--text-2);
  max-width: 560px;
  margin-bottom: 40px;
  line-height: 1.6;
}

/* Protocol Metrics Grid */
.hero-metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-md);
  padding: 24px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

.metric-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--emerald-green);
}

.metric-lbl {
  font-size: 0.8rem;
  color: var(--text-3);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.metric-val {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-1);
}

/* Interactive Yield Calculator */
.calculator-card {
  background: var(--bg-card);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-lg);
  padding: 40px;
  margin-top: 64px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.04);
}

/* Vault Cards Grid */
.vaults-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.vault-card {
  background: var(--bg-card);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all 0.25s ease;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
}

.vault-card:hover {
  border-color: var(--black-primary);
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
}

.vault-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.vault-apy {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--emerald-green);
}

/* Footer */
footer.footer-tenka {
  background: #0f172a;
  color: #ffffff;
  padding: 80px 0 40px;
  border-top: 1px solid var(--stroke);
}

.footer-nav-grid {
  display: grid;
  grid-template-columns: 2fr repeat(4, 1fr);
  gap: 32px;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: 40px;
}

.footer-col h4 {
  font-size: 0.88rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: #ffffff;
}

.footer-col a {
  display: block;
  font-size: 0.88rem;
  color: #94a3b8;
  margin-bottom: 10px;
  transition: color 0.15s ease;
}

.footer-col a:hover {
  color: #ffffff;
}

/* Responsive */
@media (max-width: 900px) {
  .hero-metrics-grid { grid-template-columns: 1fr; }
  .vaults-grid { grid-template-columns: 1fr; }
  .footer-nav-grid { grid-template-columns: 1fr 1fr; }
}